Means to prevent condensation of water on glass windows.



T. GARENGE.

MEANS 'I O'PBEVENT GONDENSATION OF WATER 0N GLASS WINDOWS.

APPLICATION FILED MAY 15, 1912.

' Patented Sept. 16, 1913.

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I MEANS TO PREVENT GONDENSATION OF WATER 0N GLASS WINDOWS. 1,073,091..

APPLICATION FILED MAY 15, 1912.

Patented Sept. 16, 1913.

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T homas Carence UNITE STATES ESE.

THOMAS CARENCE, OF KANSAS CITY, MISSOURI.

Specification of Letters Patent.

Patented Sept. 16, 1913.

Application filed May 15,1912. Serial No. 697,590.

I '0 all whom it may concern Be it known that I, THOMAS citizen of theUnited States, KansasCity, in the county of Jackson and State ofMissouri, have invented certain new and useful Improvements in Means toFre vent Condensation of lVater on Glass VVindows, of which thefollowing is a specification.

This invention relates to devices for preventing the condensation ofwater upon the inner surfaces of glass windows of locomotive cabs, motordriven cars, and the like.

It is well known that in locomotive cabs in cold weatherflshe innerfaces of the lookout windows quickly become fogged by condensationthereon from the moist atmosphere in the cab; thereby necessitating thevery frequent wiping of the glass to remove the deposit in order thatthe engineers view of signals be unobstructed. The same conditionsprevail, of course, in the motormans compartments of electrically drivenlocomotives and electrically driven passenger cars.

The object of this invention is to keep such lookout windows clear anddry, automatically, and especially in cold weather or at high altitudeswhere the temperature is always low.

In order that the invention maybe fully understood, reference will nowbe made to the accompanying drawings, in which:

Figure 1 is an outside elevation of a locomotive-cab window providedwith my improvements. Fig. 2 is a vertical section on line IIH ofFig. 1. Fig. 3 is a detail view. Fig. 4 is an inside elevation showingthe air-channel walls in closed position. Fig. 5 is an inside elevationshowing said guides in open position. Fig. 6 is a horizontal section online VIVIof Fig. 4.

1 designates the frame of a front cabwindow, which frame may be of anyusual construction.

2 designates the slida-bly mounted as shown on Fig. 2, and held in itsseat by strips 3. Its lower edge rests upon a crosspiece 4, and itsupper edge stops short of the top of frame 1 to provide an orifice 5,and is covered by a rabbeted strip 6.

The object of the construction to be described is to utilize the forwardmotion of the locomotive or car to cause a stream of air to flow overthe inner face of the glass 2, and preferably in an upward directionCAnENon, a

residing at glass-pane, Which is non- To admit the air stream to theinterior of the window, a series of horizontal, spaced, upwardly andinwardly-inclined slats 7, are fixedly mounted in the frame 1, a fewinches below the bottom of the glass 2. The slats or deflectors 7 areadapted to admit air at an upward angle into a shallow casing 8,constructed behind said slats and spaced therefrom, providing a chamber9. The cas- 111g has an inclined bottom 10 upon which cinders fall andfrom which they are discharged by the opening 12. Said casing andchamber have closed sides 13.

Hinged to the top of the casing 8 is a valve-plate 14:, which ispractically an extension of said casing. The inner edge of valveplate14: is arranged to be movable into contact with the glass 2 and itscontacting part is lined with a strip 15 of soft rubber or felt, adaptedto prevent the passage of air between the parts at times. Thevalve'plate 14 is provided with two latclrbolts 16, which are pressed inopposite directions by a spring 17, mounted on a rod 18 that passesthrough lugs 19 on the respective latch-bolts, being fixedly held in onelug and slidable in the other. Any preferred spring latch constructionmay be employed. The latchplates 20 are fastened to the inner sides oftwo blocks 21, whose position is shown by Figs. 5 and 6. Said blocksextend down in contact with the inside faces of the sides 13 of casing 8and are secured thereto. Their upper ends are about the height of thetop of the valve-plate 14. Said latch-plates 20 are each provided withfour latch-holes 22 and with a lug 23. The holes 22 are positioned toreceive the latch-bolts 16 in four different positions of thevalve-plate, and the lugs 23 prevent said plate from opening too far byacting as stops for the ends of latch-bolts 16. The latch-bolts arereleasable by drawing their lugs 19 together, said lugs also serving ashandles by which the valveplate is adjustable.

To conduct the ascending air stream to the outer air again, theslot-shaped orifice 5 is provided at the top of the glass. Said orificeis protected exteriorly by a sheetmetal hood 25, having an arched spout26 provided with a downwardly opening vent 27, which prevents theentrance of rain, cinders, etc., in connectlon with a trough 28, whichdischarges rain water at its ends.

In order that the orifice 5 may be closed when so desired, a lid 29adapted to cover In order to causethe ascendlng stream of air to passcloselyto the glass (so as to more effectively serve its purpose) a pairof lateral air-stream walls 3st are provided. As

- shown, these are constructed as wood strips,

mounted on the frame 1 by hinges 35, and in their normal position areinwardly inclined, as is shown in section on Fig. 6. The side pieces 18therebelow are similarly inclined. The hinged walls 3 1 are providedwith handle knobs 36 and with stud fastener members .37. To receive thelatter and hold .the walls frOm rattling when open,

A ,This will prevent the socket fasteningmembels '38 are providedonthe-frame 1.

The inner face of the lid 29(isprovided -withtwo small projecting pins39, that are so located as to engage the outer faces of the hinged walls84.- when the latter are in their normal position and the former isclosed down-uponthem. The pins 39 then holdthe walls in position bypreventing the latter being turned on their hinges.

The operation will'be substantially as followsz'lvhen the outsidetemperature is warm "or moderate, the valve-plate 14: is placed in itsextreme elosedposition and will be heldthere by the latch bolts 16.upfiow of outside air between saidplate andthe glass 2. The hingedair-stream walls 34: are laid back as seen on Fig. 5, and will be heldthere by the fasteners 37 and 38. The lid 29 will be pressed by itsspring 30 against the top of the glass 2, thus closing the orifice 5.When running in cold weather or in high altitudes, thevalve-plate '14 isopened at the discretion of the operator, being held. at-the desiredpoint by the latch-bolts; the {hinged walls 3st are turned to theirnormal position, and their upper ends then hold the lid 29 in openposition. As the engine or; car moves forward, air will beforcedinwardly between the slats .7, upwardly be-" tween plates 4 and14, along the surface of the glass 2, evaporating any water that andpassing may have condensed thereon,

The

out through orifice" 5 and spout 26; rearward and downward spout causesa partlal vacuum to form'thereabove, which vacuum draws air from withinthe cab and through the hood 25.

Having thus described my invention what I claim and desire to secure byLetters Patent,is:. v v p 1. In combination with a window and its frame,an aircasing communicating with and located below the window in spacedrelation thereto, a valve hingedly connected "to the upper end of theair casing and having its free end for engagement with thewindow, and avertical strip at each, side of the frame, each strip having its outerside hinged to the adjacent side of the frameand having its .free innerside extending inwardly. toward the center of the window in inclinedrelation to the latterrto deflect the air toward the center of thewindow.

2. In combination with a window and its frame, the frame having anopening located below the window, a vertical strip at each 'side of theframe, each strip having its outer side connected to the adjacent sideof the frame and havlng ts free or lnner side extending inwardly towardthe center of the window in lnclinedrelation to the latter to deflectthe air toward thelcenter of the window. 1

8. In combination with a window and its frame, the frame havinganopening located "above the window, a vertical strip at each side of theframe, each strip having its outer side connected to the adjacent sideof the frame and having its free or inner side extending inwardly,toward thercenter of the window in inclined relation to the latter todeflectthe air toward the center of curvature of said the window, and aclosure for, said opening, 1 i

said closure when in open position seating 'on the upper endsof saidstrips and being held by the latter in open position.

' In testimony whereof I aflix my signature, in the presence of twowitnesses.

v I THOMAS GARENCE. l Witnesses:

F. G. FISCHER,

. Copies of this patent may be obtained for five cents each, byaddressing" the Commissioner of Batents, I Washington, D. 0.

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